shell:$ nslookup -timeout=2 -retry=1 'cv.med.unne.edu.ar'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
Name:	cv.med.unne.edu.ar
Address: 181.15.198.170
;; communications error to 75.98.161.224#53: timed out